Art of making car-wheels.



No. 808,071. PATENTED OCT. 31, 1905( O. T. SGHOEN. ART OF MAKING CARWHEELS.

APPLICATION FILED FEB.281905.

q vimaoom UNITED STATES PATENT OFFICE.

ART OF MAKING CAR-WHEELS.

Specification of Letters Patent.

Patented Oct. 31, 1905.

Application filed February 28, 1905. Serial No. 247,634.

To all whom it may concern:

Be it known that 1, CHARLES T. ScHoEN, a citizen of the United States,residing atPhiladelphia, in the county of Philadelphia and State ofPennsylvania, have invented a certain new and useful Improvement in theArt of Making Gar-Wheels, of which the following is a full, clear, andexact description.

The object of this invention is to produce a forged car-wheel from arolled slab or billet, preferably of steel. The desired blank isobtained from selected rolled stock free of pipings and other likedefects likely to cause the wheel to scale or chip, and in its angularform it is subjected to the action of dies, which reduce it to acircular form of less diameter and .maximum thickness than the finishedwheel,

and this blank is then subjected to the action of dies, which form arudimentary closed hub, web, and rim, after which the rim is sheared toa substantially true circle, and then the thus-treated blank issubjected to the action of other dies, which finish the hub externally,reduce the web to its proper contour and thickness, and finish the rim,and then and while the plank is in the last-mentioned dies the hub iscompleted by punching out the closing web formed in the first dies. Thethus-formed. wheel may be trued and dished in any suitable way.

In the accompanying drawings, illustrating the invention, in the severalfigures of which like parts are similarly designated, Figure 1represents in edge and plan views a slab or billet suitable for thepurposes of this invention. Fig. 2 is an elevation of a pair of dieswith the slab or billet in position for treatment. Fig. 3 is an edgeView of Fig.2. Fig. 4 is a plan view, and Fig. 5 is an edge view, of ablank produced in the dies of Figs. 2 and 8. Fig. 6 is a verticalsection of the first-operation dies for treating the blank of Figs. 4and 5. Fig. 7 is a plan view of the blank after treatment in the dies ofFig. 6. Fig. 8 is a vertical section, open, of a pair of dies forreducing the blank of Fig. 7 to the article shown in Fig. 9. Fig. 9 is aView similar to Fig. 8, but closed and with the hub-punch in position.Fig. 10 is a cross-section of the product of the dies of Figs. 8 and 9.

The blank 1 is a flat rectangular slab or billet of steel or othersuitable metal, which should be selected from stock free from pipings orother defects likely to cause scaling or chipping in the finished wheel.This blank is placed between a pair of dies 2 3, having segmentalmatrices 4 and 5, which are capable of acting upon opposite angles ofthe blank and reducing them to segments of circles, after which theblank is turned in the same dies with the other and unreduced angles inthe matrices and acted upon by the dies, and these operations arerepeated as often as may be necessary to reduce the blank to thecircular form shown in Figs. 4 and 5 and designated 6. The blank 6 isthen subjected to the action of a pair of dies 7 and 8. The die 7 has anacorn-shaped projection 9 and a surrounding annular projection 10, andthe lower die 8 is provided with similar projections 11 and 12,respectively, so that when these dies are brought to bear upon the blank6 the rudimentary hub 13 and the web portion 14 are formed, the hubbeing closed by the web 15. The blank 16, Figs. 6 and 7, as it comesfrom the dies 7 8 is then subjected to the action of a pair of dies 17and 18, having, respectively, the hub-receiving cavities 19 and 20, thewebforming projections 21 22, and the flangedtread-forming flat 23, andcavity 24, so that when these dies are brought together about the blank16 the hub 25, Fig. 9, is practically externally finished, as is alsothe web 26 and the flanged tread 27. As shown in Fig. 8, the dies 17 18are provided with central perforations for the passage of a punch 28 forpunching out the hub-closing web 15. By the dies described a wheel maybe produced in a finished condition, ora Wheel-blank may be producedrequiring some rolling to finish its web and tread, or a wheel may beproduced in which the only finishing necessary is to bore or turn offthe flanged tread. Of course the blank is treated in a heated condition.

It is to be observed that the upsetting of the angular blank tends tocondense the metal, and thus better fit it for the subsequent treatmentin the shaping-dies. The acorn projections displace the metal intorudimentary hub form and leave the slight closing web which may bereadily punched out without distorting or disturbing the preformed hub.Under the action of the dies, Fig. 6, the metal is reduced about the hubto form the web and stretched out radially, .and of course this radialstretching imparts an irregular periphery, so that it is necessary totrim the blank for the next-operation dies. This trimming may be done byshears and while the blank is still in the dies. The punching, asindicated in Fig. 9, is done preferably while the product is heldbetween the dies and in sequence. As.

slab or billet of wrought metal to the action of dies and therebyreducing its angles to curves and forming a circular blank, thenpressing out the hub and adjacent portions of the web, trimming the rimand finally die- 5 finishing the hub, web and flanged tread.

In testimony whereof I have hereunto set my hand this 27th day ofFebruary, A. D.

CHARLES T. SCHOEN.

Witnesses:

WM. L. AcHILLEs, MEDWAY W. SILL.

